I finished the map, and I felt that the physics was "fair," as long as the player is aware of the fact that (possible spoiler, but I think it's supposed to be a "known fact of the game") When Chell picks things up, she doesn't actually reach out and hold objects with her hand. Rather, there's some electrical activity coming from the end of her portal gun, and that electrical field is what's picking things up.

As a general rule, I am not happy with puzzles that kind of "mock" the physics of the real world. However, specifically, in response to Curilee's complaint about the "bug" in the game -- where the player can manipulate objects on the other side of a grate...

I used to feel exactly the same way, but a friend reminded me that you can pretty clearly see that Chell is not actually reaching out and holding objects with her hand. Rather, there's some electrical activity coming from the end of her portal gun, and that electrical field is what's picking things up.

So it does seem reasonable that she can move things on the other side of a grate, although it is definitely a learned behavior!

Awful. Probably the worst of this collection. Tell me, if I was a human (such as Chell), how could I possibly hold onto and slide a large cube on the opposite side of a grate??? I wouldn't. So I shouldn't be able to in here. Again, cheating by exploiting a "bug" in the game engine. Not logical, so not a good puzzle. Sorry. I'm stopping here, not finishing the rest of your collection since you don't play fair : (

HINTS Room #1:1. Getting the cube to the button is solvable. It does not require any advanced throwing techniques (just correct portal placement)2. The light bridge is ONLY used for getting the cube. It is not used for getting the cube onto the funnel.3. (if you are desperate) For getting the cube onto the funnel, AT FIRST, you should have only one portal active (before you activate the second one). Instead of having two portals simultaenously.

HINTS Room #2:1. The player does not need to go through the fizzler. The fizzler only needs to be shut down for a few seconds, rather than for the entire time.2. For the upper platform, the author uses grating rather than glass. There is a certain property that grating has that glass doesn't. Try to figure out what it is.3. (if you are desperate) Related to hint #2. Also, think about why the button on the platform's purpose is to reverse the funnel.

never mind. i got it. genius. it took me a very, very long time but definitely one of the most rewarding puzzles out there!!! for those who want to know, here is a hint: go back to basics, having everything, is nothing, having nothing, is a start.

So yeah..i thought that my own puzzle chamber i did was clever, but man...your mind is on another level. I liked and commented all your chambers so far and I hope you won't stop making them. Valve should hire you. :)

I finished it, but i'm still confused as f***. I'm pretty sure I didn't solve the first half of the puzzle as intended, since i invented a move of my own to surpass this evil conundrum. I call it the 'dice throw', which requires you to hold the cube in angled position for it to land further after a running throw. Basically, what i didn't get was the area around the entrance (which i didn't use), so after many failed attempts I managed to throw the cube onto the spring and back myself to the pressure plate just in time for it to pass the portal into the funnel without a harm. . It was pretty hard to pull off, but i was desparate and couldn't figure out the correct method. I will add some pictures in my follow up comment.. (1000 char limit)

i woud use glas for forcing the portalble plate, where the lightbridge hits, only. and you dont need to place water to the entrace in the next room or the lightbridge, but for design its good. I like this map, too.